Polyolefin Resin TORAYPEF®

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TORAYPEF® is long, sheet-like foam that is semi-rigid and features closed cells that are produced via electron beam cross-linking.

With its advanced features such as light weight, heat insulation, shock-absorbing properties, moldability and non-absorption, the product is widely used in a huge variety of fields, including molded interior automotive parts, building insulation, joint filler, pipe covers, and other industrial materials as well as daily necessities, health and sports equipment.



TORAYPEF® is the registered trademark corresponding to an electron beam cross-linked polyolefin foam developed by Toray using proprietary manufacturing technologies. The product was first launched in 1968 (Showa Year 43) and has since seen use in a large number of different applications. The product was initially developed primarily as a polyolefin foam but high performance grades, including flexible grades (EVA), flame retardant grades and heat resistant polypropylene foam were subsequently developed and sold. TORAYPEF® is long sheet-like foam featuring an expansion ratio of 5x to 50x and a 100% closed cell structure which exhibits superior cushioning, shock-absorbing and heat insulation properties, water resistance and superior chemical properties, with a wide range of potential applications.

Characteristics of Polyolefin Foam TORAYPEF®

Superior Shock-Absorbance

The product exhibits superior resilience and flexibility as well as excellent absorption of impact energy. In addition, it combines comfortable cushioning with firmness due to its closed-cell structure.

Superior Heat Insulation

The product's thermal conductivity, water absorption and water vapor transmission rates are extremely low and the product is well suited as a thermal insulation material.

Superior Waterproofing and Buoyancy

With its closed-cell structure, the product does not absorb water and shows excellent resistance to water and moisture. Furthermore, the product is highly buoyant.

Superior Aesthetics

Cross-linking via electron beam ensures that the surface is smooth with fine textured bubbles.

Superior Workability

Additional processing steps such as cutting, slicing, molding and adhesion are easily achieved.

Superior Chemical Resistance

Compared with other plastic foams, TORAYPEF® is virtually immune to the effects of chemical agents.


Cutting and Punching

Cutting is generally performed using a vertical cutter but cutting can also be performed using scissors or a razor. Additionally, punching and boring can be performed using a Thomson punching machine.


The product can be easily sliced using a slicing machine which employs a rotating knife.

Thermal Fusion Bonding

The product can be thermal fusion bonded to other PEF objects as well as steel or aluminum plating. Work can be performed simply by using a hot air gun or a Teflon-coated thermal plate.


A list of adhesives which exhibit good compatibility with PEF is given below.

Name Manufacturer Components Diluent Usage Other Base Materials Notes
DC-761D (Summer Use)
DC-6105 (Winter Use)
EX-6E (Summer Use)
EX-8 (Winter Use)
Nogawa Chemical

Saiden Chemical
Chloroprenes Toluene Applied to both adhesive surfaces, which are pressed together once dry. Iron Plate,
Aluminum Plate,
Spraying, roll coating or brush coating can be used.
Good all-purpose adhesive which is water-resistant.
Water Bond 7

Sumitomo 3M

Hitachi Kasei Polymer


Applied to a single adhesive surface which is pressed to the other adhesive surface following a suitable time interval. Please contact the manufacturer. Concrete,Other

Effective for soft PVC sheeting
Well-suited for areas where solvents cannot be used.

Additionally, products which are thinly pre-coated with adhesive at our manufacturing plant (SP finished products) as well as corona discharge-treated products (EC finished products) with increased adhesiveness are available.


Both vacuum molding and pressure molding are possible. Moldability varies among different product grades; the drawing ratio of PE grades as determined via a straight assay is approximately 0.5 while the drawing ratio of PP grades varies from approximately 0.6–1.0.

Surface Treatment

Various surface treatments such as embossing, flocking and printing can be performed.

Remarks for Handling

Handling Precautions

Technical Measures

  1. Prevention of Handler Exposure: smoking should be avoided during use.
  2. Fire and Explosion Prevention: spark-proof tools should be used.
  3. Precautions: under normal circumstances, good overall ventilation is sufficient. When heating the product during processing, white smoke may be produced, so equipment with ventilation should be used or ventilation facilities should be established.
  4. Precautions for Safe Handling: rough handling and dropping should be avoided.


Appropriate Storage Conditions

  1. Maximum storage temperature: 50 °C

Storage Conditions to Avoid

  1. Product should be stored away from heat.
  2. Fire and Explosion Prevention: spark-proof tools should be used.
  3. Product should be stored away from ignition sources: smoking prohibited
  4. Product should be stored away from direct sunlight.